Which of the following is NOT a power granted to Congress?

The power to appoint Supreme Court Justices is not granted to Congress; rather, it is a power assigned to the President of the United States. The President has the authority to nominate justices to the Supreme Court, and those nominations must be confirmed by the Senate. This is a vital aspect of the checks and balances system within the U.S. government, where each branch has specific responsibilities and powers.

On the other hand, Congress holds several significant powers as outlined in the U.S. Constitution. For instance, Congress can levy taxes, which allows it to raise revenue for government operations. It also has the authority to declare war, giving it a crucial role in decisions around national defense and military action. Additionally, Congress can coin money, which includes regulating and controlling the nation’s currency. These powers collectively emphasize the legislative branch's role in governance and its responsibilities to manage federal finances and national security.